Safety device for platen printing-presses.



M. ROGKSTROH. SAFETY DEVICE FOR PLATEN PRINTING PRESSES.

A'PPLIUATION FILED SEPT.11,1907.

908,330. Patented Dec.29,1908.

UNITED STATES MAX FOGKSTROH, OF KLEIN-SE DLITZ, NEAR PIRNA, GERMANY.

SAFETY DEVICE FOR PLATEN PRINTING-PRES SES.

No. 908,330. Specification of Letters Patent; Patented Dec. 29. 1908.

Application filed September 11, 1907. Serial No. 392,329.

' To all whom it may concern:

Be it known that I, MAX R-OGKSTROH, company director, citizen of the Kingdom of Saxony, and resident of Villa Liitzc r, Flein-Sedhtz, nearPirna-on-tl1e-Elbe, have made certain new and useful Improvements in a Safety Device for Platen Printing-Presses, of which the following is a specification.

Safety devices for protecting the hands of the operators of laten printing presses are .already known w erein on a level with the edge of the platenithere is arranged a rotary flap, which while the platen is open restsagainst its edge, but which towards the'end of the closingmovement folds upwards and. moves the endangered hand upwards and rearwards. Such flaps have usually been actuated by means of a lever pivoted either to thg frame of the press or to the connecting .ro Y Now according to this invention the entire safety device, consisting of the rotatable flap and the parts actuating it, is mounted on a separate support and is not connected, either rigidly or detachably with any portion of the press, with the result that by removing the support the entire safety device can be disconnected from the press, and can be fitted -'in a simple and economical manner to any' platen press. Figure 1 is a side elevation showing a preferred form of the invention, the platen being in inoperative position. Fig. 2 is a similar view, the platen being in operative position. Fig. 3 is a fragmentary elevation of the working face of the platen and showing the safety device in elevational perspective. Fig. 4 is a side elevation similar to Fig. 1, showing a slightly modified embodiment of the construction, and Fig. 5 is a similar view, simi lar to Fig. 2, of such modification.

In the constructional form illustrated in Figs. 1, 2 and 3, the arm a, which is detachably connected with the laten, carries on its free end the protecting fl ap b, c and has piv-- oted on the stud f thereon the guide bearing e for the rod (2 around which there is coiled a spring k that tends to draw the rod d down Wards and by these means to press the safety flap 17,0 which is flexibly connected therewith against the upper edge of the platen. The

lower end of the rod (1 isfree; and when the platen closes this lower free end eomes in contact with'the connecting rod g with the result that the rod (1 is forced upwards and the spring 'hj-compressed. -The arms I) and the horizontal safety rod 0 now turn upwards and r the hand resting on the edge of the platen.

and 3 inasmuch as the rocking arms I) are dispensed with,'the safety rod 0 being directly attached to the spring rods d. The bearing e for the spring h and the rod d is in thisconstruction pivoted at f to the end of the support a; while the lower end of the rod (Z 1s '11, which is provided on its lower-edge with a projection that comes in contact with the ten closes. 1&1 this construction also the safety rod 0 moves upwards and backwards. Having now particularly described and ascertained the nature of my said invention formed I declare that what I claim is 1. In a safety device for platen printing presses, in combination, a supporting arm secured to the platenfor movement therebar arranged to he moved by the rod towards or away from the platen, a member pivoted on the arm and connected p'ivotally to said *rod, spring means for holding the rod in a normal position with the bar against the platen when the latter is in inoperative posi tion, and means for moving the rod to store energy in said spring means and to move the bar away from the platen, upon the completion of th'ef movement of'the latter to operative position. I I

2. In a safety device for platen printing pressed in combination, a suppbrtlng arm secured withfa member mounted for pivotal movement on. theiend of the arm, a 'horizontal safety bar carried by the member and movable with the member towards and away from the platen, a guide pivoted; on the arm, a rod tive position.-

presses, in combination, a supporting arm The constructional form shown in Figs. 4; and.5 differs fromthat shown in Figs. l, 2

rearwards (Fig. 2 and' remove out of danger connected with the arm a by means of a7 link' upper edge of the connecting rod 9 as thep a w and in what manner the same is to be perwith, a pivoted guide on the arm, a rod passed, through the guide, a horizontal safety to the platen for moyement therepassed through the-guide and pivoted to said 110. 3. In a safety 'devicefor platen printing.

secured to the platen for movement therewith,'a member mounted for pivotal movement on the end of the arm, a safety bar carried. by the member and movable towards and away from the platen, a rod connected to said member to eflect dpivotal-movement thereof, a guide pivote on the arm and throughwhlch said rod is passed, means for moving said rod in one direction in one position of the platen and means to engage said rod and move the same in an op osite direc- 't1on, 1n another position of the aten. 4. In a safety device for-p aten printing presses,in combination, a supporting arm secured to the platen for movement there- 7 with,,a.safety bar movable towards and away from the platen, a guide member on the arm and formed with two lugs, a rod associated tionin one position of the platen, and means to eifect movement of the rod in an op osite direction, in another position of said p aten.

5. In a safety device for platen printing presses, in combination, a supportlng arm secured to the platen for movement therewith, a safety bar movable towards and away from the platen, a pivoted guide on the arm, a rod passed through the guide and associated with the safety bar to efl'ect movement thereof, a member pivoted on the arm and connected pivotally to said rod means for moving the rod in one direction in one position of the platen, and means to effect movement of the rod in an op osite direction, in another position of the p aten.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

MAX ROCKSTROH.

Witnesses:

PAUL AREAS, ULYssEs J. BYWATER. 

